PT-2018-11456 · Xen+1 · Xen+1

Laura Pardo · Published 2018-06-27 · Updated 2024-07-29 · CVE-2018-12893

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Xen versions prior to 4.11

Description An issue in Xen allows a malicious PV guest to crash the system, leading to a Denial of Service. The vulnerability can be triggered by a guest and is caused by an oversight in safety checks added to prevent Xen livelocking with debug exceptions. Only x86 systems are vulnerable, and only x86 PV guests can exploit the issue. An attacker needs to control hardware debugging facilities, which are typically available to unprivileged users.

Recommendations For Xen versions prior to 4.11, update to version 4.11 or later to resolve the issue. As a temporary workaround, consider restricting access to hardware debugging facilities to minimize the risk of exploitation.

Fix

Related Identifiers

CVE-2018-12893

DLA-1577-1

DSA-4236-1

OPENSUSE-SU-2018_2116-1

OPENSUSE-SU-2018_2211-1

OPENSUSE-SU-2024:11520-1

SUSE-SU-2018:1981-1

SUSE-SU-2018:2037-1

SUSE-SU-2018:2056-1

SUSE-SU-2018:2059-1

SUSE-SU-2018:2069-1

SUSE-SU-2018:2081-1

SUSE-SU-2018:2081-2

SUSE-SU-2018:2528-1

Affected Products

Suse

Xen

References · 153

• https://osv.dev/vulnerability/openSUSE-SU-2024:11520-1 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2018-12893 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:2037-1 · Vendor Advisory
• http://openwall.com/lists/oss-security/2018/06/27/11 · Patch
• https://security.gentoo.org/glsa/201810-06 · Vendor Advisory
• https://osv.dev/vulnerability/DSA-4236-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2018-12893 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2018-12893 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:1981-1 · Vendor Advisory
• https://osv.dev/vulnerability/DLA-1577-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:2069-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:2081-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2018-12893 · Security Note
• https://support.citrix.com/article/CTX235748 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2018:2056-1 · Vendor Advisory